package com.jbricx.swing.ui.tabs;

import javax.swing.event.TreeModelListener;
import javax.swing.tree.DefaultTreeSelectionModel;
import javax.swing.tree.TreeModel;
import javax.swing.tree.TreePath;

/**
 * 
 * @author Stack Overflow,
 *         http://stackoverflow.com/questions/10151341/how-to-create
 *         -a-file-directory-and-contained-files-from-a-file-array
 * 
 */
@SuppressWarnings("serial")
public class FileTreeModel extends DefaultTreeSelectionModel implements
		TreeModel {
	// We specify the root directory when we create the model.

	protected FileNode root;

	public FileTreeModel(FileNode root) {
		this.root = root;
		// setSelectionMode(TreeSelectionModel.DISCONTIGUOUS_TREE_SELECTION);
	}

	// The model knows how to return the root object of the tree
	public Object getRoot() {
		return root;
	}

	// Tell JTree whether an object in the tree is a leaf
	public boolean isLeaf(Object node) {
		return ((FileNode) node).isFile();
	}

	// Tell JTree how many children a node has
	public int getChildCount(Object parent) {
		String[] children = ((FileNode) parent).list();
		if (children == null)
			return 0;
		return children.length;
	}

	// Fetch any numbered child of a node for the JTree.
	// Our model returns FileNode objects for all nodes in the tree. The
	// JTree displays these by calling the FileNode.toString() method.
	public Object getChild(Object parent, int index) {
		String[] children = ((FileNode) parent).list();
		if ((children == null) || (index >= children.length))
			return null;
		return new FileNode((FileNode) parent, children[index]);
	}

	// Figure out a child's position in its parent node.
	public int getIndexOfChild(Object parent, Object child) {
		String[] children = ((FileNode) parent).list();
		if (children == null)
			return -1;
		String childname = ((FileNode) child).getName();
		for (int i = 0; i < children.length; i++) {
			if (childname.equals(children[i]))
				return i;
		}
		return -1;
	}

	// This method is invoked by the JTree only for editable trees.
	// This TreeModel does not allow editing, so we do not implement
	// this method. The JTree editable property is false by default.
	public void valueForPathChanged(TreePath path, Object newvalue) {
	}

	// Since this is not an editable tree model, we never fire any events,
	// so we don't actually have to keep track of interested listeners*/
	public void addTreeModelListener(TreeModelListener l) {
	}

	public void removeTreeModelListener(TreeModelListener l) {
	}

}